Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Earnings Per Share
Loss from continuing operations	$ (57,874)	$ (115,485)	$ (102,675)
Shares used in computing basic loss per share	42,830	43,775	43,346
Effect of dilutive securities:
Stock-based awards and convertible debt
Shares used in computing diluted loss per share	42,830	43,775	43,346
Loss per share:
Loss per share, Basic (in dollars per share)	$ (1.35)	$ (2.64)	$ (2.37)
Loss per share, Diluted (in dollars per share)	$ (1.35)	$ (2.64)	$ (2.37)
Shares excluded from calculation of diluted shares due to loss from continuing operations	1,500	600	900
Shares attributable to dilutive effect of conversion of debt securities	1,000	200	400